A fetal heartbeat can be detected as early as six weeks, before many women know they're pregnant, the Associated Press reported.

Currently, Georgia allows abortions during the first 20 weeks of pregnancy. If the new law is not blocked in court, it would take effect Jan. 1, 2020.

Staci Fox, the president and CEO of Planned Parenthood Southeast, said she has "one message for Governor Kemp: We'll see you in court," the AP reported.

The bill "criminalizes doctors who provide lifesaving care" and "allows the state to investigate women for having miscarriages," according to Planned Parenthood, which pledged to unseat lawmakers who support the it.

Under "50 years of Supreme Court precedent, this abortion ban is clearly unconstitutional," ACLU of Georgia legal director Sean Young told the AP.

"Every federal court that has heard a challenge to a similar ban has ruled that it's unconstitutional," Young said.